<template>
<!--头部区-->
  <el-container class="home-container">
    <el-header>
      <div >
        <img src="../assets/tb.png" alt="" class="logo">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区-->
    <el-container>
      <!--侧边栏-->
      <el-aside width="200px">
        <!--侧边栏菜单区-->
        <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409eff" :unique-opened="true" :router="true"
      :default-active="activePath">
      <!--一级菜单-->
      <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
        <!--一级菜单模板区-->
        <template slot="title">
          <!--图标-->
          <i :class="iconsObj[item.id]"></i>
          <!--文本-->
          <span>{{item.authName}}</span>
        </template>
        <!--二级菜单-->
        <el-menu-item :index="'/' + subItem.path + ''" v-for="subItem in item.children" :key="subItem.id"
        @click="saveNavState('/' + subItem.path)">
          <template slot="title">
          <!--图标-->
          <i class="el-icon-menu"></i>
          <!--文本-->
          <span>{{subItem.authName}}</span>
        </template></el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!--右侧区域主体-->
      <el-main>
        <!--路由占位符-->
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
  data() {
    return {
      //  左侧菜单数据
      menulist: [],
      iconsObj: {
        '125': 'iconfont icon-user',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      //  被激活的链接地址
      activePath: ''

    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //  获取所有的菜单
    async getMenuList() {
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.menulist = res.data
      console.log(res)
    },
    //  保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  }
}
</script>

<style lang="less" scoped>
.logo {width: 50px;height: 50px;}
.home-container {
  height:100%;
}
.el-header {
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }

}
.el-aside {
  background-color: #373d41;
  .el-menu {
    border-right: none;
  }
}
.el-main {
  background-color:#eaedf1;
}
.iconfont {
  margin-right: 10px;
}
</style>
